Swollen hands and feet in mid-pregnancy may be caused by obstruction of venous reflux, malnutrition, kidney disease and other reasons. 1. Obstruction of venous return: In the middle of pregnancy, as the uterus grows, the enlarged uterus will compress the veins, thus causing obstruction of venous return, which will show the symptoms of swollen feet, which is a normal physiological phenomenon. 2. Malnutrition: Some pregnant women suffer from malnutrition and hypoproteinemia, which makes the fluid in the blood vessels leak out to the tissue interstitial space, and will also show swollen hands and feet. 3. Kidney disease: If a pregnant woman has a kidney-related disease, she will urinate less, and the accumulation of body fluids in the blood vessels can not be discharged in a timely manner, which may lead to the leakage of fluids into the soft tissues, and the swelling of the whole body will occur. If there are symptoms of swollen hands and feet in mid-pregnancy, there may be other causes, and you should go to the hospital in time to find out the cause of edema. In normal times, you should pay attention to balanced nutrition, light diet, pay attention to rest, moderate activity, work and rest.